Automatic stop for phonographs.



No. 890,338. PATENTED'JUNE 9, 1908.

0. P. COOK. AUTOMATIGISTOP FOR PHONOGRAPHS.

APPLICATION FILED OOT.12, 1907.

Unrrnn err-inns earner or ron CHARLES :e. coon, or rL M-onrn, commonest.

AUTOMAIIG STOP FOR PHONOGEA'PHS;

No. ceases.

Specification of Letters "Patent.

Patented June 9, recs.

Application filed October 12, 1907. Serial. No. 3917,2552.

or phonographs, and has particular reference to devices whereby such machinesv may be automatically stopped at the desiredtime at the end. of. the travel of the reproducer.

' Among the special objects aimed at in the present invention are to provide a device of the character above described. which is simple in construction, easy of application to the machine, and in which the parts are readily adjustable according to the various types of machines towhich is applicable and to compensate for variationsaccording v to the various requirements.

For a full understanding of the invention,

I including its advantages and mode of operation, reference istc be had to the following detail description, and to'the accompanying drawings, in which Figure 1 is a general perspectiveview of a fragment of a common type of phonograph or talking machine, with the present inven. tion shown as applied thereto, and Fig. 2 is a plan view of the attachment. J

In the-several views of the drawings simi lar parts are referred to by like reference characters.

Having particular reference to the ,drawings by reference characters, thetalking machine or phonograph is represent d diagrammatically at 10, and the same includes a frame or flange 11 lying at one side of the record cylinder. Projecting upwardly through the casing 12 and at the outer side of the frame 11 is a starting lever 13. The parts thus far referred to are conventional. A base plate 1 1, made of any suitable material such as angle metal and having a horizontal and a vertical flange, is adapted to be detachably secured as by means of a bracket 15 and a clamp 16 to the aforesaid frame 11. The horizontal flange 14 of the base plate 14 is pro ided with a slot 1.? which registers with the ordinary slot in the top of the casing 1.2 and through which the aforesaid lower 13 projects vertically.

Secured in any substantial manner by screws near one end oi the base plate 14 1s a vertical bracket 18 having a horizontalpivot 19, and on this )ivot-is o. naied for oscillae tion in a vertical plane, a trip lever 20, The longer end or the body of tms lever 20 lies substantiallyparallel with the record cylin der, and the shorter end thereof is upturned as at 21 and adjustably mounted in the upper end of the part .21 is a screw 22, lying sub.- stantially parallel with the aforesaid body portion of the trip lever. The longer end of the trip lever 20 is normally forced downwardly by any suitable means and said end is provided with'engagement'means such as a notch 23, the shoulder of whichis directed outwardly with respect to the supporting pivot 19. As a convenient means for forcing the aforesaid outer end of the trip lever downwardly, there is employed a leaf spring 24, one end of which is secured to the bracket 18 and the free end of which lies in codperative engagement with the short end 21 of said lever, forcing the latter upwardly.

A clamp is detachably secured as by means of a screw 26 to the upper, end of the starting lever 13. Said clamp is herein indi cated as being ti-shaped and the ends thereof are bent outwardly away from each other forming a finger piece 27 and a catch the latter .coperating. with the aforesaid. notch 23. At the end of the clamp on the opposite side of the starting lever 13 is secured as by. an eyelet 29 a spring 30 whose other end is secured to some fixed pointsuch as a binding screw 31 adjacent to the aforesaid bracket 18.

Having thus described the mechanical structure of the invention, its mode of application and operation will be appreciated: The'base plate 14 is put in place on top of the machine with the starting lever 13 passed upwardly through the slot 17 and is then se-,

cured in place by the securing means 15 and 16. The clamp 25 is then secured at its desired adjustment on the upper end of the starting lever 1.3 so that the normal tendency of the spring 30 is to forcibly draw said lever toward the bracket 18, or to the right as indicated in the drawings. When it 15 desired to start the instrument the operator grasps the finger piece 27 and draws the clamp 25 and the starting lever against the tension of the spring 30 and brings the catch 28 into locking coi'jperation with the notch 2-3 of the trip lever. At the end. of the run of the machine the lower end 32 of the reproducing arm will engage the end of the screw 22 and rock the trip lever on its pivot 19, against the tension of the spring 24, and will thereby release the notched end of the said lever from the catch 28, allowing the force of the s ring 30 to promptly and forcibly throw the ever 13 to the right and stop the machine. The screw 22, it will be understood, is adjustable longitudinally with respect to the path of movement of the arm 32 to vary the point or time at which the machine will be auto matically sto ped, according to the t pe of machines or t e character of the recor to be em loyed. The plane of the catch 28 is slig tly at an angle to that of the finger piece 27 for the purpose of providing a more efiective engagement with the notch 23'.

As indlcated in the drawings, it is desirable in the ractical operation of the attachmentthat a ayer of material such as felt, shall be placed between the flanges of the base plate and the casing of the phonograph, whereby any tendency of the attachment to cause rattling would be prevented,

Having thus described the invention what I claim as new and desire to secure by Letters Patent of the United States is 1. In an automatic stop mechanism for phonographs, the combination with a base plate and means to secure it in place, of all u right bracket secured to the said base p ate, a trip lever journaled in said bracket for oscillation in a vertical plane; one end of the trip lever being turned at an angle to the main part thereof, a screw adjustably mounted in said lever end and lying substantially parallel with said main part, a starting lever clam having a catch to cooperate with said trip ever and a finger )iece, resilient means normally tending to roc the trip lever on its pivot in one direction, and means normally tendin to draw the said starting lever clamp.

towar said bracket upon oscil ation of the trip lever in the OPPOSltG, direction, substantia ly as set forth.

2. In combination with a phono raph having a frame member, a starting ever, and

reproducer arm, of an automatic stop mechanism therefor comprising a base plate,

means to secure the same to said frame member, a trip lever pivoted for oscillation, one end of said lever being notched and the other end bein upturned at an angle to the main portion tIiereof, a screw mounted in said upturned end and lying in thepath of said re producer arm, a clamp adjustably secured to said starting lever and having a catch to cooperate with the notch aforesaid to hold the clamp and its lever in one position, and a spring attached to saidclamp tending normally to draw said clamp and lever. out of said position upon the occasion of contactof the reproducer arm with the said screw.

3. In an automatic stop mechanism for phonographs, the combination of a bracket, a,

trip lever pivoted thereto, one end of the said lever having a notch and the other endbeing turned at an angle to the main body portion thereof, a U-shaped clam having at one end a catch to cooperate wit the notch aforesaid, means to adjustably secure the clamp to-a part to be moved, means to cause the trip lever to oscillate on its pivot, and a spring attached at one end to the saidclamp and at the other end to the said-bracket whereby on the occasionof the aforesaid oscillation' of the lever tocause the release'of the catch, the clamp is quickly moved.

4E. The combination with a phonograph embodying a reproducer arm and starting lever, of stop mechanism comprising a clamp secured=to the startinglever, and having an oppositely extending catch and finger piece, a spring connected with the clamp, and a trip lever engaging the catch of the clamp, to ho d the spring under tension and the-starting lever inoperatiye, and arrangedfor actuation by ,the reproducer arm to release the clamp and permit stopping of the machine by the starting lever.

In testimony whereof I affiii my signature in presence of two witnesses. I

I CHARLES P. 600K. Witnesses:

LEN'A G. MCBURNEY, SAMUEL WHEELER. 

